给出了基于小波的图像压缩编码的基本原理与主要几种小波图像压缩算法，讨论了图像编码中小波基选取、边界处理以及分解级数等几个问题。
The followings are studied in this thesis: principle of wavelet based image coding methods, key problems of wavelet transform in image codec and some main coding algorithms based on wavelet.
为在计算机上做傅里叶级数的分解，需要对连续信号进行抽样，然后按离散傅里叶级数进行分解。
In order to analyzing digital signals with the aid of computers, it is necessary to use Fourier Series of discrete form.
在碱性溶液中，连二亚硫酸钠的分解反应级数为1.5级。
The order of the anaerobic decomposition of the sodium dithionite in the alkaline solution is 1.5 order.
笔者在此指出了罗朗级数的系数与有理函数分解的部分分式之和的系数之间的关系，并举出应用实例。
This paper points out the relationship between the coefficient of Laurent series and that of the sum of partial fractions for rational functions. Some typical examples are presented in illustration.
借助于脉冲波形的傅里叶级数分解，研究了一般交流应力条件下金属化电迁移的影响因素，建立了一般交流应力条件下金属铝膜电迁移寿命模型。
Metal Aluminium film EM in general AC stress has been researched with Fourier decomposition, developing a Metal Aluminium film EM life model under in general AC stress.
通过对开关函数求傅里叶级数，将开关函数模型分解为高频和低频两个模型，从而求得整流器的状态空间平均模型。
The switching function model may be divided into two models of high frequency and low frequency. Then the average model for condition space of the rectifier is developed.
利用球面调和级数的空间正交分解特性，计算三维颅骨的空间分解特征向量，继而构造三维特征描述子。
A new approach is presented to calculate 3d skull spatial decomposition feature vector through using the orthogonal decomposition property of spherical harmonic transform.
利用球面调和级数的空间正交分解特性，计算三维颅骨的空间分解特征向量，继而构造三维特征描述子。
A new approach is presented to calculate 3d skull spatial decomposition feature vector through using the orthogonal decomposition property of spherical harmonic transform.
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